Window arrangement for fume hoods



July 20, 1954 J. M. I IPTAY WINDOW ARRANGEMENT Foa FUME Hoonfs" 3 Sheets-Sheet l Filed Feb, 3, 1949 Filed Feb. s, 1949 July 20, 1954 J. M. LIPTAY WINDOW ARRANGEMENT FOR FUME HOODS 3 Sheets-Sheet 2 July 20, 1954 J. M. LIPTAY WINDOW ARRANGEMENT FOR FUME HOOD-S w 0 i M l l l a Filed Feb. 3, 1949 Patented July 20, 1954 meer UNITED STATES FTENT OFFICE WINDOW ARRAN GEMEN T FOR FUME HOODS John M. Liptay, Scarsdale, N. Y.

Application February 3, 1949, Serial No. 74,270

(Cl. 2li- 40) 13 Claims. l

This invention is an improved and serviceable fume hood having as one object the provision of a multiple closure system comprising a plurality of selectively controlled closure units including window frame carrying runners telescopically associated with projectible and retractible tracks slidably guided by vertically disposed guides above the common work surface of the fume hood, the closure units being adapted to provide prompt access to selective portions of the fume hood however unobstructed by inullions. Another specific object of the invention is realized in utilizing slidably guided telescoping members adapted to be conveniently collapsed in the matter of opening each unit and adapted to be quickly extended for closing its respective portion of the fume hood. Another important object resides in the provision of latching means on the runners for interlocking with the tracks on closing of the frames to project these tracks below the guide means. Another object is to provide a fume hood of the character alluded to wherein the entire work surface of the hood may be conveniently rendered accessible and Without obstruction upon raising of all the win-v dow carrying frames. Other important functional and structural features of the invention will appear from the following detailed specification considered in the light of the accompanying drawings wherein: l

Fig. 1 is a front elevational and fragmentary view of the fume hood according to my invention illustrating the multiple closure system partly opened and closed.

Fig. 2 is a fragmentary perspective view of Fig. 1.

Fig.. 3 is a transverse vertical sectional view on the line 3-3 of Fig. 2.

Fig. 4 is a transverse horizontal sectional and broken view on the line 4 4 of Fig. 2.

Fig. 5 is a sectional View on the line 5-5 of Fig. 2. y

Fig. 6 is an enlarged and fragmentary sectional view on the line 6--6 of Fig. 5.

Fig. 7 is a sectional View on the line 'l-i of Fig. 2.

Fig. 8 is a sectional view on the line 3-8 of Fig. 2.

Fig. 9 is a perspective View of one of the lower runners or rails illustrating its spring controlled normally retracted latch adapted to return Athe intermediate runners on closing of the window frames.

Fig. 10 is an enlarged fragmentary view of Fig. 3, and

Fig. 11 is a fragmentary perspective View of two of the units shown fully raised or open.

Representative of the embodiment disclosed, the fume hood generally designated MU is appropriately associated with support S characteriaed by the work surface WS which may form a part of cabinet C or may constitute the top surface of a floor on which the cabinet rests.

Effectively fixed to a wall WL of cabinet C in any suitable manner are outside angle irons as iii and the spaced intermediate angle irons or brackets I I. These angle irons have secured thereto by bolts B and nuts N companion parts of spaced inner guide channels or tracks G and G each of which is preferably C shaped as shown. Slidably guided by or trained over guides G and G and retained thereon are the reverse C .shaped runners or intermediate tracks R and R in turn slidably straddled and guarding the channel shaped runners RN and RN xedly secured to the sides I3 of the window sashes or frames F to each of which is fixedly attached lip or projection P welded at I4 (Fig. 8) to the chan- `nel shaped sill or block LB adapted to rest on work surface WS (Fig. 2).

More specifically each runner RN comprises an offset arm I -5 (Fig. 4) merged with web I6 having the inwardly bent arm I'I fastened to a back retaining panel I3 and to an associated window frame F by appropriate screws as I9. If desired panel I8 may be welded to arm Il, the arrangement being such that arm I5 and companion panel I8 slidably straddle and are guided by an associated intermediate track R.

Runners RN are characterized by 'a flange or arm 2li, a web 2l and' an inwardly turned arm '22 secured to the window frame F and to the back retaining panel or strip 23 by screws as 24 and strip 23 may be also welded to arm 22. Thus arm 2t and strip 23 of each runner RN slidably straddle and are guided on an intervening track R. i

Oi importance is the additional function of the offset arms I5 of the lower rails or runners RN which slidably overlap arms or components 20 of adjacent intermediately disposed runners RN', thereby facilitating linear and relative slidable displacement of juxtapositioned runners RN and RN and it should also be observed that suitable collars I2 are mounted on bolts B to adequately space the fixed guides GV and G' from theircompanion angle irons It and II adequately anchored to the supporting wall WL desirably spaced and suspended appreciably above the work surface. WS.

For sealing the rear face of the sill or block LB of a window frame F, a panel 45 is suitably welded thereto and to the frame F and fastened to the latter at the upper part thereof is an upper angle iron UC (Fig. 7) to which the channel shaped member or hollow upper block UB is appropriately welded and this block has its offset tail portion T effectively held to the frame F and to the angle iron UC in any suitable manner. Thus frame F, `the upper and lower blocks UB and LB, and the runners RN and RN move in unison when a thrust is applied to lip P in the process of raising or lowering of a selected window frame each of whichisprovidedwitha transparent window pane WP sealed by an adequately retained gasket K.

In Fig. 2, the window framesF areshown `closed and therefore the lower blocks LB are resting on the work surface WS of the flooring, support or foundation S. As each frame is raised thelaterally-extendingftongues or lugs as 50 and 5l projecting" from the lower'runners-or channeled rails RN- and 4RN"meet theflowerends LE and LE* ofthe .slidablyfguided intervening tracks or channel Ashaped mem-berswRv and, R',

thereby raising the-latter'relative to Ythe'upper tracks or guides G and G. .-Suchactiorrhowever .is =facilitated'-by;:the spring counterweights or balancers CB mounted on a platform 52intervening and" desirably ffixed tocompanion angle irons I and Ilr andto pairs of companion-intermediate angle rirons Il. YThespring tapes '53" of the balancers CB passthrough reliefand'gnide slots: 54'(Fig. 2) and-the lower ends are-,provided with swiveled loops, 55.hooked. to zhasps 56, fasi tened Vto the 'upper block UB. `Upward displace- 1 ment of the frames AIiqislimitedl by; overhanging "lugs as'A 5l' extending:*fron-rv the ixed guides'G xedly suspended above the workisurface.

.On closing of a sash frame F,..downward.'dis placement of :the tracks R..and R1is.limited' by :the vlaterally'extending."lugs1=35 ands35; as the vtop parts thereof strike stop `brackets, as' T36' and 36' fastened to the columns orv guidesGt and G'.

In Fig. 1, four closure.unitsjW,-.X,1Y and'Z areshown associated with thencommonrsupport or foundation S of a multiple fume hood MU, and

each of `the 1 units. is `structurally. identical and. 'of course `is suspended from: a pair of companion v angle 'irons I- and- Il or'fromi anpair. ofinter- AmediateI angleirons Il appreciablyaboveirthe Awork surface WS. Eachunit may'be .controlled independently of the other and selectively operated. For example, inFig; 1, .framesF of units W-and. X are fully closedl while thosevof-=units Y land`Z' are fully raisedl although' ally frames or 'any combination*thereofmay' be fullyorpartly raised: or closed. Thus'rby'the present arrangement the work surface may be extendedas desired without interference :by intermediate posts` vv`or mullions.

Where the frames F are fully closed and resting on the work surfaceWS, the beveled Ybolts or s latches asf and- 60 (Figs. 2, 3 and 10) .of each frame are :movably'f disposedin openings 62"'at the top-.part of the lowerrailsor runners RN and RN' and in openings as!` 6|. at the-top ofithe-intermediate channel shapedtracksf Raand 1 R. These latches arexed to.a;lange' 63largerrthan .an associated opening; 62. and .each'ange 63: is fixed to an offset leaf sprng :64 (Fig: "10) secured atits lower end' Ato Ythee runners'. `RN-.;anda--RN.

f" means `:fill tand 60 towardsgthe :.rails RN Aand-'RN'. However if a frame be raisedL fronrits fiillyclosed- "the actuating lugs 5U and 5l of the runners strik- 'such action tracks R and R are raised andy ing and abutting the lower ends LE and LE. By

eventually fully telescope over guides G and G at which time tracks R and R and runners RN strike the overhanging stop lugs 51 and at which ltime-the window is fully opened.

On closing of a window frame F, runners RN andRN are slidably guided downwardly relative to the tracks R and R and eventually latches 60 l.and.interlockwith openings 6l ofthey tracks VR and .'Rftherebydriving the latter downwardly relative totthe guides G and G untillugs'35 and 35l of'tracks R and-'R' meet the fixed stop 36 yand 36 of the `guidesG and G at which time thevwin- Adow vframe, is.` fully "closed and resting on support IS.

`By the present invention, quick access may be hadwith convenience toV allparts of the work surface WS to` provide forrlargerrworking areas since the telescoping members RN and R and RN and R may be easily-collapsed over the guides G and G', and convenientlyy may be easily extended for effectively closing `the fume hood.

'Various changes'may be made inthe details of construction and arrangement of parts Without departing. from the spiritl of the invention or sacrificing any of theadvantagesy thereof inherent therein.

I'claim:

l. In al Window arrangement for cooperating with a fume hood,V a framemovable towardsv or away from a workingsurface of said hood-spaced guide means, spaced means xedly sustaining lsaid guide means appreciably spaced above lsaid work surface, rspaced channel shapedtrack means slidably retained byfsaid guide means, and spaced channeled runners fastened to the sides of* said frame and slidably 'straddling and guided' by said track means.

2,'In a window arrangement for cooperating with a fumehood, aframe movable towardsY or away from a working surface of said hood, spaced guide means, means xedly sustaining said guide means appreciably spaced above said work surface, spaced track means telescopically receiving and slidably retained by said guide means, 'and spaced channeled runners-fastened to the sides f 'of' said frame-and telescopically receivingV and slidably guided by said track mea-ns.

"3. -In awindow arrangement for cooperating with a fume hood, a frame vertically movable towards or away from a substantially horizontal working surface of said hood, spaced and vertically arranged substantially C shaped guide means, means-fixedly sustainingsaid guide means appreciably spaced above said work surface,

. spaced"andsubstantially.reverse C shaped and vertically Y disposed vtracks f telescopically receiving f and vslidably retained by said guida'means. and adapted to be projectedbelowthe latter,rspaced channeled and vertically arranged runners'fastened tothesides of said frame andtelescopically receiving and slidably guided by said tracks; and

means to limit the projection of said tracks below said guide means.

4. In a window arrangement for cooperating with a fume hood, a frame vertically movable towards or away from a substantially horizontal working surface of said hood, spaced and vertically arranged guide means, means iixedly sustaining said guide means appreciably spaced above said work surface, spaced channel shaped and vertically disposed tracks telescopically receiving and slidably retained by said guide means and adapted to be projected below the latter, spaced channeled and vertically arranged runners fastened to the sides of said frame and telescopically receiving and slidably guided by said tracks, means to limit the projection of said tracks below said guide means, and means carried by said runners for raising said tracks vertically towards said guide means and away from said work surface.

5. In a window arrangement for cooperating with a fume hood, a frame vertically movable towards or away from a substantially horizontal working surface of said hood, spaced and vertically arranged guide means, means fixedly sustaining said guide means appreciably spaced above said work surface, spaced channel shaped and vertically disposed tracks telescopically receiving and slidably retained by said guide means and adapted to be projected below the latter,

spaced channeled and vertically arranged runners fastened to the sides of said frame and telescopically receiving and slidably guided by said tracks, means to limit the projection of said tracks below said guide means, means carried by said runners for abutting the lower ends of said tracks for elevating the latter towards said guide means and away from said work surface, and said guide means having means to prevent upward displacement of said tracks and runners beyond the elevation of said guide means.

6. In a window arrangement for cooperating with a fume hood, a frame vertically movable towards or away from a substantially horizontal working surface of said hood, manipulatable means carried by said frame, spaced and vertically arranged guide means, means fixedly sustaining said guide means appreciably spaced above said Work surface, spaced channel shaped and vertically disposed tracks telescopically receiving and slidably retained by said guide means and adapted to be projected below the latter, spaced channeled and vertically arranged runners fastened to the sides of said frame and telescopically receiving and slidably guided by said tracks, means to limit the projection of said tracks below said guide means, means carried by said runners and responsive pursuant to an upward thrust on said manipulatable means for raising said runners towards said guide means and away from said workgsurface, and stop means overhanging said guide means to prevent upward displacement of said runners and tracks beyond the elevation of said guide means.

'7. In a window arrangement for cooperating with a fume hood, a frame vertically movable towards or away from a substantially horizontal working surface of said hood, spaced and vertically arranged guide means, means fixedly sustaining said guide means appreciably spaced above said work surface, spaced channel shaped and vertically disposed tracks telescopically receiving and slidably retained by said guide means and adapted to be projected below the latter, spaced channeled and vertically arranged runners fastened to the sides of said frame and telescopically receiving and slidably guided by said tracks, means to limit the projection of said tracks below said guide means, and locking means automatically effective on downward displacement of said runners relative to said guide means for bodily shifting said tracks with said runners and towards said working surface.

8. In a window arrangement for cooperating with a fume hood, a window frame vertically movable towards or away from a substantially horizontal working surface of said hood, spaced and vertically arranged guide means, means xedly sustaining said guide means appreciably spaced above said work surface, spaced channel shaped and vertically disposed tracks telescopically receiving and slidably retained by said guide means and adapted to be projected below the latter, spaced channeled and vertically arranged runners fastened to the sides of said frame and telescopically receiving and slidably guided by said tracks, means to limit the projection of said tracks below said guide means, lugs carried by the lower portions of said runners for shifting said tracks away from said surface and towards said guide means on opening of said frame, and laterally extending lugs projecting from said guide means to prevent displacement of said tracks and runners beyond the upper end of said guide means at the completion of the opening of said frame.

9. In a window arrangement for cooperating with a fume hood, a window frame vertically movable towards or away from a substantially horizontal working surface of said hood, spaced and vertically arranged guide means, means rlxedly sustaining said guide means appreciably spaced above said work surface, spaced channel shaped and vertically disposed tracks telescopically receiving and slidably retained by said guide means and adapted to be projected below the latter, spaced channeled and vertically arranged runners fastened to the sides of said frame and telescopically receiving and slidably guided by said tracks, means to limit the projection of said tracks below said guide means, lugs carried by the lower portions of Said runners for shifting said tracks away from said surface and towards said guide means on opening of said frame, stop means at the upper part of said guide means to prevent displacement of said tracks and runners beyond said guide means at the completion of the opening of said frame, and locking means operable on downward displacement of said runners to shift said tracks bodily with said runners.

l0. In a window arrangement for cooperating with a fume hood, a window frame vertically movable towards or away from a substantially horizontal surface of said hood, spaced and vertically arranged guide means, means fixedly sustaining said guide means appreciably spaced above said work surface, spaced channel shaped and vertically disposed tracks telescopically receiving and slidably retained by said guide means and adapted to be projected below the latter and having openings intermediate the ends thereof, spaced channeled and vertically arranged runners fastened to the sides of said frame and telescopically receiving and slidably guided by said tracks, spring controlled latching means carried at the upper parts of said runner for interlocking with the walls of said openings to shift said tracks below said guide means on shifting of said runners towards said surface, means to limit the projection of said tracks below said guide .'means, lugs carried cy the lower portions of said runners for shifting said tracks away from said surface and towards said guide means on opening of said frame, stop means to limit displace- `ment of said tracks and runners at the completion of the opening of said frame, and said latching means having means adapted to be cammed by walls of said openings to unlock said tracks on displacement of said runners away from said surface.

l1. In a window arrangement for cooperating with a fume hood, window frames selectively and vseverally vertically movable towards or away from a substantially horizontal working surface `of said hood, pairs of spaced and vertically arranged guide means, means xedly sustaining said guide means appreciably spaced above said work surface, pairs of spaced channel shaped and lvertically disposed tracks telescopically receiving and slidably retained by said pairs of said guide means and adapted to be projected below the latter, pairs of spaced channeled and vertically arranged runners fastened to the sides of said frames and telescopically receiving and slidguiding of said juxtapositioned runners relativo to each other.

' aperti-t1 zu; ively and severally movable towards or away from a substantially horizontal working snri'acf.. of said lined, a pair of spaced and vertically arrange cuide means for each of said frames, deans xedly sustaining said guide means appreciahly spaced above said work surface, a pair of spaced cher-.nel shaped and vertically disposed tracks from each of said trames telescopicaliy receiving and slidably retained oy said guide means of respective frames and adapted to be projected below said guide means, a pair of spaced channeled and vertically arranged runners for each A of said frames and fastened to the sides thereof and telescopically receiving and slidably guided by said tracks or respective frames, means to limit the projection of said tracks below said guide means, lugs carried by the lower portions of said runners of respective frames for shift- -st 'oct the sep 8 ing said tracks of the latter away from said surface and towards said guide means o respective frames on opening or `said frames, stop means integral with said guide means to prevent displacement of said tracks and runners beyond said guide means at the completion of the opening of said frames, and said runners and tracks of all of said frames adapted to be shifted away from said surface and towards said guide means to unobstruct the separation between all of said guide means and working surface.

13. In a window arrangement for cooperating with a fume hood, window frames selectively and severally movable towards or away from a substantiaily horizontal working surface of said hood, a pair of spaced and vertically arranged guide means for each of said frames, means lixedly sustaining said guide means appreciably spaced above said work surface, a pair or" spaced channel shaped and vertically disposed tracks for each of said frames and telescopically receiving slidaiily retained by said guide means of respective frames and adapted to be projected below said guide means, a pair of spaced channeled and vertically arranged runners for each of frames and `fastened to the sides thercoi and telescopically receiving and slidably guided by said tracks oi respective frames, means to limit the projection of -said tracks below said guide means, lugs carried by the lower portions of runners of respective frames for shifting said tracks of the latter away from said surface and towards said guide ci respective iframes on op ling of trames, stop means to limit e`f.isplarV Pent said tracks and runners at coz; on or the opening of said frames, said runners rnd tracks or all of said frames adapted to 'ce ted away from surface to unooration between all of guide means and wo. .ng surface, and means for disengageacly locking said runners and tracks of ctive frames to bodily move said last tionJ runners and tracks tovffards said working surface.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 500,016 Lohman June. 20, 1393 1,471,137 Worgncr Oct. 16, 1923 1,599,286 Renton Sept. 7, 1926 1,677,952 Byrnes July 24:, 1928 2,023,052 Julin Dec. 1935 2,027,016 Bingham Jan. E', 1936 2,088,866 Patterson Aug. 3, 123'? 

